Weft feeler-tip for looms



E. s. s|MPsoN- WEFT FELER TIP FOR LOOMS.

APPLICATION FILED AUGJ. 1920.

'Patented June 7, 1921. 1mg. E. E '4 F .EME

UNITED STATES PATENT oEFIeE. j

EDWARD S. STIMPSON, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPEB, CORPORATION, F HOPEDALE, MASSACHUSETTS, A CORPORATION OIE.IVIIA I1\TE.

WEET FEELERFTTP non LooMs.

specication of Letters Patent. I i Patented June 7, 1921,

' Application filedV August '7,V 1920. SerialNo. 401,943.

T 0 all whom t may r0071.067, z p

Be it known that I, EDWARD S. STIMPsoN,

' of Hopedale, in the county of Vorcester and State of Massachusetts, have invented a new Weft F eeler-Tip for Looms, of'which the following is a specification.

' The present invention is animprovement upon the feeler mechanism set forth in my United States Letters Patent No. 1,309,226, July 8, 1919, andfconsists in theffeeler tip construction.

ln the type' of laterally sliding feeler disclosed in said patent, it is important that the teeth of the feeler tip should cling to the weft so as to prevent premature side slipping under all conditions of the weft winding. Unless this is the case the bobbins may be ejected while still carrying a large amount of weft. At the same time, the teeth must freely and with certainty slip alongr the bare bobbin so that the functional side slip will take place when demanded. Also, the tip organization should be such that the weft will not be cut and that the bobbin will not be scratched or marred.

The present invention relates to such a. construction of the tip that it will adequately cling to the weft when in contact therewith, and will slip reliably upon the bare bobbin without scratching or marring the same.

The improvement is illustrated in the accompanying drawings, in which- Figure l, is a plan view of the feeler mechanism. Fig. 2, is a plan view of the feeler tip on an enlarged scale. Fig. 3 is a plan view of the feeler tip on an enlarged scale illustrating the side slip of the tip on the bare surface of a bobbin. Fig. 4 is a vertical section in the plane indicated by the line 4 4 in Fig. 2. Fig. 5 is a view looking at the weft contacting face of the feeler tip.

The side slipping feeler armv A. is similar in construction and mode of operation to that of the feeler arm set forth in the aforesaid Patent No. 1,309,226. The present improvement relates solely to the feeler tip B.

The feeler tip is an' integral portion of the feeler arm and it constitutes the weft feeling end of said arm. The weft feeling face of the feeler tip is curved in a horizontal direction so as to be convex toward the weft bobbin as shown in the plan views of Figs. 2 and 3. Also, in vertical planes the weft contacting surface of the tip is likewise curved and convex toward the bobbin as *slits D in the weft Vcontacting face of the tip.

These slits are inclined with respect tothe :upper and lower surface ofthe tip, as shown 1n Fig.y 5, and are such as would be made by a saw with fiat parallel sides.k The result is that each tooth C is blunt along horizontal lines, it is pointed along vertical lines due to the convexity of the rear end of the tip, it is inclined between top and bottom, and it has square edges. l

Owing to the horizontal convexity of the feeler tip, as shown in Figs. 2 and 3, the rear weft contacting ends of the teeth are arranged in a horizontally extending arc of a circle, so that the rear ends of the teeth are at varying distances from the cylindrical surface of the bobbin or other weft carrier, as illustrated in Fig. 3. In the normal position of the feeler arm, shown in Figs. l and 2, the middle teeth of the tip are nearer'the axis of the bobbin than the teeth at either end of the horizontally extending arc.

The effect of this tooth construction is that the teeth sink into the mass of the weft along both horizontal and vertical lines as exaggeratedlv shown in Figs. 2'and 4 respectively. ence, when the weft E is present the teeth cling to the weft and prevent the feeler arm moving laterally under the impact or frontward push of the bobbin F. The teeth cannot cut the weft because they are blunt and because they extend diagonally so that no one tooth can enter between parallel convolutions of the weft on the bobbin.

At the same time, when the bobbin is bare where it contacts with the tip, the tip slips laterally along the bare surface due to the impact of the bobbin, as illustrated in Fig. 3. This slip takes place with certainty and without any scratching or marring of the bobbin, since the teeth rock as well as slip on the bobbin. n

Fig. 1 illustrates the weft just making initial contact with the feeler tip and also shows parts of the feeler mechanism which immediately coperate with the feeler arm.

rearwardly by a spring G. When the feeler4 arm slides laterally, as indicated inV Fig. 3,

acontroller H is-Inoved laterally thereloj7 initiating the action of the weft replenishing mechanism as fully set forth in the aforesaid patent thereby eEecting` the replenishing ofweft before lthe running weft `is completely exhausted. y f

I claim- 1. A feelei` having its weft contacting end convex toward the bobbin bothvertically and horizontally, said weft contacting end having a plurality of integral teeth arranged in a horizontally extending-curve, said teeth being constituted by slits in the weft contacting end of the feeler extending `diagonally from the top to the bottom of ,yr In witness whereof, I

the feeler whereby teeth are formed integral with'the feeler and having blunt rear and square edges 'and `extending diagonally from the top. to the bottom of the feeler.. f

2. A feeler arm having at its weft contacting end a plurality of integral teeth,

said teeth being constituted by slits in the rear end `of the feeler tip extendingdiagonally from the top to the bottom of the feeler. v Y

' 3. A feeler having its feeling end curved in a horizontal direction, .said feeling vend having a plurality of teeth, `each of which extends diagonally from the top to the bottom of the feeler. o

4. A feeler having a plurality of. teeth at its feeling or contacting end, each of said teeth extending diagonally from thetop to the bottom of the feeler.V a l have hereunto signed my name. v Y. i v

i `EDWARD S. STIMPSON.` 

